The Lucky Cap increases the wearer's base defense by 33, and it adds 2 to the wearer's PP recovery rate and adds 8% to the wearer's overall chance he or she will Unleash his or her weapon when attacking in battle.

While this item doesn't provide a luck boost like its name might suggest, it is nonetheless a useful piece of equipment to be on at least one of your Adepts at the end of Golden Sun because of a solid Defense rating, a small and incidental PP recovery boost that's there nonetheless, and a small boost to the chance that the Adept's equipped weapon will Unleash, all in one package. If transferred into The Lost Age via Password, it will be obsoleted quickly because of equipment both with higher Defense and much higher PP recovery (Crown of Glory, Psychic Circlet) and with higher Defense and Unleash rate (Mythril Helm, Demon Circlet). Although, since the Mythril Helm can only be equiped by Isaac, Felix, Garet, and Piers, the Lucky Cap may be worth keeping to be worn by Ivan, Mia, Jenna, or Sheba to avoid wearing the cursed Demon Circlet.